This digital textbook covers core physical science concepts and includes interactive features, real world examples, and videos.

[Free Registration/Login may be required to access all resource tools.] Energy is the ability to do work. In organisms, this can be physical work, like walking or jumping, or it can be the work used to carry out the chemical processes in...

In this experiment, three reactions are performed in a sealed Ziploc bag so that they can be observed. Students identify whether physical or chemical change has taken place.

Great animations showing how sound is produced.

Kids learn about the science of light. Energy made of waves and particles called photons traveling at the top speed in the universe. What is refraction? The difference between transparent, translucent, and opaque.

Kids learn about the universe in the science of astronomy including expansion, size, dark matter and energy, age, and fun facts.